Journal
TALANTA
Volume 66, Issue 4, Pages 1034-1041Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2005.01.007
Keywords
determination of Cu2+; cyclic tetrapeptides; neutral ionophores; PVC membranes; potentiometric sensors; copper in rocks and wastewater
Categories
Ask authors/readers for more resources
Two novel membrane sensors sensitive and reasonably selective for Cu2+ ions are described. These are based on the use of newly synthesized cyclic tetrapeptide derivatives as neutral ionophores and sodium tetraphenylborate (NaTPB) as an anionic excluder in plasticized PVC membranes. The sensors exhibit fast and stable near-Nernstian response over the concentration range 1.0 X 10(-6) Mol l(-1) to 1.0 X 10(-2) Mol l(-1) Cu2+ with a cationic slope of 30.2-25.9mV per decade at pH 4.5-7 with a lower detection limit of 0.05-0.13 mu g ml(-1). Effects of plasticizers, lipophilic salts and various foreign common ions are tested. The sensors display long life-span, long term stability, high reproducibility, and short response time. Selectivity of both sensors is significantly high for Cu2+ over Fe3+, Al3+, Zn2+, Cd2+, Hg2+, Ni2+, CO2+, Mn2+, alkaline earth and alkali metal ions. The sensors are used for direct measurement of copper content in different rocks and industrial wastewater samples from electroplating factories. The results agree fairly well with data obtained using atomic absorption spectrometry. (c) 2005 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available